Yes, pigs are carriers of Trichinella cysts, and can pass the parasite to humans, where it can cause no symptoms to flu-like symptoms in mild cases, and in severe cases can kill a person. The cyst can be killed by freezing for 10 days at 0 degrees F or lower, or by thorough cooking of meat to 160 degrees F. FWIW, all sorts of animals can carry and transmit trichinosis, including cattle and other ruminants like deer and elk, as well as predators like cats, dogs, coyotes, etc. Trichinella infect animals by being eaten, then migrate out of the intestine to the muscles where the cysts are encapsulated in muscle tissue of the animals. If you eat the cyst, you get trichinosis.